The armour of Linuparus eocenicus extended along much of its body. Raised ridges and spines marked the upper shell, while the segmented abdomen continued the ridged outline towards the tail. This was a spiny lobster rather than one of the heavy-clawed kinds: its fossil body reveals a different way of being a lobster, with protection provided by an elaborate outer shell instead of enormous front pincers.

The fossil material helps us imagine more than the animal’s head. Quayle described a substantial abdomen, tapering towards the tail, and shell structures that continued from one part of the body to another. Living spiny lobsters provide a comparison for its broader body plan, although the preserved anatomy does not establish where this species sheltered or what it ate.

Its remains also tell a story of changing coastlines and geological discoveries. Material has been recovered from the London Clay at Portsmouth Docks, the Isle of Sheppey and other parts of southern England, while additional fossils were described from Whitecliff Bay on the Isle of Wight.

Some of these remains had once been confused with a different spiny lobster. When the fossils were compared more carefully, differences in their armour revealed animals that had previously been treated as one. Their preserved shells gave researchers a clearer picture of the variety of spiny lobsters inhabiting Britain’s Eocene seas.